How long would it take for the amount of u-235 to reach 1/8 of its initial amount? One of the nuclides in spent nuclear fuel is U-235, an alpha emitter with a half life of 703 million years.

Q: a. What is the mass of Fe3O4 in the sample? O 0.2291 g O 0.4817 g O 0.3212 g O 0.1018 g O 0.2141 g

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Q: 1.45 grams sample of acetic acid, HC2H3O was burned in excess oxygen in a bomb calorimeter. The calo...

A: moles of acetic acid = 1.45 g / 60.05 g mol-1 =0.02414 mol heat released is equal = q1 heat absorbed...

Q: Given the same reactant concentrations, the reaction Cog) + Cl,(g) → COCI,(g) at 241°C is 79.3 times...

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Q: The rate of a certain reaction is given by the following rate law: rate = k[NO]°[0,] Use this inform...

A: Order of reaction is the power raised to the concentration.

Q: Answer the following questions: 1. Why do liquids assume different shapes on the surface of the wax...

A: As per the guideline, since you have asked multiple questions, we have solved the first question for...

Q: Using the table of standard formation enthalpies that you'll find under the ALEKS Data tab, calculat...

A: Solution -

Q: 9. The % w/w of I- in a 0.2144-g sample was determined by Volhard titration. After adding 50.00 mL o...

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Q: 11. A 101.3-mg sample of an organic compound known to contain Cl is burned in pure O2 and the combus...

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Q: Select the transition that results in emitted light with the shortest wavelength. On = 6 to n = 5 On...

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Q: For a certain reaction, the frequency factor A is 3.7 x 10° s1 and the activation energy is 18.3 kJ/...

A: Given, Frequency factor (A) = 3.7 × 109 s-1 Activation energy (Ea) = 18.3 kJ/mol = 18.3 × 1000 J/mol...

Q: w long

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Q: nd on measuring its resistance it is found to be y ohm, w ment if resistance of aqueous solution of ...

A: For cell 1 Resistance(R1) = y ohm Specific conductance(k1)=  = x ohm.cm-1 For cell 2,  Resistance (R...

Q: When a weak acid, HA, is titrated with a strong base, NaOH, what species are increasing in concentra...

A: Weak acid does not dissociate completely and the dissociation of the weak acid HA is given by: HA  ⇌...

Q: Calculate the pH of a 0.87 M methylamine solution.

A: pH of solution is defined as negative logarithm of hydrogen ions. 

Q: Determine the equilibrium constant (solubility constant) when a total of 0.025 m of M2SO4 wa dissolv...

A: Given reaction: M2SO4(s)↔2M++SO42-                     (Note that the reaction given in the question...

Q: What mass of AgI (234.8 g/mol) can be produced from a 0.8093 g sample that is 47.6% MgI2 (278.11 g/m...

A: 0.8093 g of sample has 47.6 % MgI2 . Here, we have to calculate the mass of AgI that can be produced...

Q: and carbon dioxide after ozonolysis HO after reacting with BH, and H,O, KOH

A: Given products are :  And  Identify the reactants = ? 

Q: 6. A buffer is prepared by adding 20.0 g of sodium acetate (CH3COONa) to 500 mL of a 0.150 M acetic ...

A:

Q: How does a rate constant differ from an equilibrium constant for a reaction?

A: For a general reaction : aA + bB ⇌cC + dD  Rate of forward reaction = kf[A][B]  ---(1) Rate of backw...

Q: Consider this reaction: CICH,CH,CI (g) → CH,CHCI (g) +HC1 (g) At a certain temperature it obeys this...

A: The rate law equation is the type equation that can be represented the correlation between the two s...

Q: Can you give examples of molecules where we can find the following atoms in? Thanks! O (sp3-hybridi...

A: Hybridization is defined as mixing of atomic orbitals so as to rehybridize to form new set of orbita...

Q: If a 0.59 M solution of a monoprotic acid HA has a pH of 4.57, what is the Ka value of the acid HA?

A: Concentration of Acid HA = 0.59 M pH = 4.57     ICE Table:                                          ...

Q: The protein content of the unknown samples were determined using BSA as standard. The absorbance val...

A: Given data for standard:

Q: A 50.0 mg sample was dissolved in acid and then diluted to a total volume of 50.00 mL. If 1.000 mL o...

A: In spectrophotometric measurements of analyte concentration, measured absorbance related to the conc...

Q: this is a witiig lab. starting agents are 9-anthracene-carboxaldehyde and benzyltriphenylphosphorium...

A:

Q: Does the effect of intermolecular attraction on the properties of a gas become more significant or l...

A: Gases have negligible intermolecular attractions. The order of intermolecular attractions are in the...

Q: Consider this overall reaction and its proposed mechanism. Write a valid rate law expression for the...

A: Chemical kinetics can be defined as the branch of chemistry that deals with rates of chemical reacti...

Q: 「一 Exp. Initial [A] (mol/L) Initial [B] (mol/L) Initial [C] (mol/L) Rate (mol/Lmin) 1 0.200 0.100 0....

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Q: particular first order reaction has a rate constant of 0.330 min-1. How many minutes will it take f...

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Q: Q2 : At 25°C, K = 3.40 x 10-3 S m-1 for 0.00100 M NH4OH. Values of Lo are: NH4C1 = 0.01497, NaOH = 0...

A:

Q: What are the types of gravimetric methods? Give an examples where each method is used in an analysis...

A: Generally, there are four types of gravimetric methods which are listed below - - > 1 -Volatiliza...

Q: Calculate the number of grams of HI that are at equilibrium with 1.25 mol of H, and 63.5 g of I at 4...

A: The amount of HI can be calculated as follows

Q: 4. Calculate the molar concentration of oxygen in water at 25°C for a partial pressure of 0.22 atm. ...

A: The formula used is:-  C = KH P  Where C = concentration  KH = Henry's constant P = pressure 

Q: 2. A 0.8102-g sample of impure Al,(CO3)3 decomposed with HCI; the liberated CO, was collected in CaO...

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Q: How many mililiters of 0.085 M NaOH are required to titrate  the following solution to the equivalen...

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Q: Be sure to answer all parts. Calculate the concentrations of all the species in a 0.145 M Na2CO3 sol...

A:  Given: 0.145 M Na2CO3 solution. For H₂CO3,, Ka1 = 4.2 × 10-7 and  Ka2 = 4.8 × 10-11 To Calculate:  ...

Q: E will be more positive than E° in plution E will be more negative than E° in plution E will be more...

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Q: Briefly outline why cinnamaldehyde, cinnamic acid and cinnamyl alcohol travelled different distances...

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Q: Chemistry Write structural formulas for reactions! Bromocresol green+NaHCO3= 1) Br Br H,C CH HQ + Na...

A: A chemical formula which shows the arrangement of atoms of the molecular structure.

Q: What exactly is SEO?

A:                                   Answer  What exactly is SEO its means  Search engine optimization 

Q: 2- The values for A°m A2B , X3Y2 and A3Y are 2.4 , 1.5 and 1.8 respectively. Calculate the A°m for X...

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Q: Fill up the empty boxes with the correct chemical structures. HO. NOH

A: In the given reaction the alcohol is converted into oxime and the number of carbon atoms is increase...

Q: What volume of a 0.470M HCl reacted with enough Zn metal to produce 1.50 g ZnC12 based on the follow...

A: Given mass of ZnCl2 = 1.50 gram Molar mass of ZnCl2 = 136.39 g/mol  

Q: Dissolution constant of K3[XCl3] = 5.15 * 10-39 what is equilibrium concentration of chloride in 1....

A: Given: Dissolution constant of K3[XCl3] = 5.15 * 10-39 Initial concentration of  K3[XCl3] =  1.46 M ...

Q: A chemist must prepare 0.500 L of 2.00 M aqueous calcium bromide (CaBr,) working solution. He'll do ...

A: To solve this question, use the formula which contains two molarities and volumes in it and solve fo...

Q: To a solution containing 1.0 × 10 ^(- 2) M AgNO3 and 2.0 × 10 ^(- 2) M Pb (NO3) 2 is added, with sti...

A: Given :  Concentration of AgNO3 = 1.2 x 10-2 M  So, concentration of Ag+ = 1.2 x 10-2 M  Concentrati...

Q: e quantity of

A:

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.